Bottle cap



FIG. 1 is an isometric view of a front, top, and left side of an ornamental design for a bottle cap;

FIG. 2 is a left side elevational view of the cap of FIG. 1, the right side, front, and rear elevational views being the same as FIG. 2;

FIG. 3 is a top plan view of the cap of FIG. 1; and,

FIG. 4 is a bottom plan view of the cap of FIG. 1.

The broken line showings of the bottle cap bottom in FIG. 4 are included for the purpose of illustrating unclaimed portions of the bottle cap and form no part of the claimed design. 

CLAIM The ornamental design for a bottle cap, as shown and described. 